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The "Baywatch" star, whose battle with the bottle went viral with a 2007 video showing him writhing drunk and shirtless on the floor begging for a cheeseburger, laughed about the incident at a Comedy Central roast. The YouTube clip drew more than a billion viewers, all clicking to see the beloved-by-Germans singer and erstwhile talent judge's rock bottom moment. Prior to Sunday's taping, which airs Aug. 15, Hasselhoff had never addressed the infamous video.

"I've been waiting for a forum to talk about where I'm at," Hasselhoff told Popeater backstage at the event. " I didn't do it in the beginning because I was in a very personal matter and it involved the custody of my children."

Celebrities in Rehab

"How do you make jokes about a joke? How do you embarrass a man who so thoroughly embarrasses himself?" MacFarlane asked. "How do you put someone down when they are already lying shirtless on the floor."